ERROR 256: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2002] Connection refused

Fatal error: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2002] Connection refused in /home/jconstru/public_html/hawsedc/phpGedView/includes/classes/class_pgv_db.php on line 405